Update energy-management-app README.md (#36662)

* Update energy-management-app README.md

Add link to `kBasicInstallationTestEvent` definition

* Update README.md

* Update README.md

* Restyle

* Update README.md

Use commit it

Author: lboue

examples/energy-management-app/linux/README.md

@@ -595,8 +595,9 @@ Step-by-step:
 
 1. Set the default TestEventTrigger (`0x0094000000000000`):
 
--   `0x0094000000000000` corresponds to `kBasicInstallationTestEvent` from
-    `WaterHeadermanagementTestEventTriggerHandler.h`
+-   `0x0094000000000000` corresponds to
+    [`kBasicInstallationTestEvent`](https://github.com/project-chip/connectedhomeip/blob/5e3127f5ac61e13c572a968199280d90a9c19dce/src/app/clusters/water-heater-management-server/WaterHeaterManagementTestEventTriggerHandler.h#L47)
+    from `WaterHeadermanagementTestEventTriggerHandler.h`
 -   `hex:00010203...0e0f` is the `--enable-key` passed to the startup of
     chip-energy-management-app
 -   `0x12344321` is the node-id that the app was commissioned on